wading bird vs shoebill

wading bird and shoebill both are nouns.

Word	Noun	Adjective	Verb	Adverb
wading bird	Yes	No	No	No
shoebill	Yes	No	No	No

As nouns, shoebill is a hyponym of wading bird; that is, shoebill is a word with a more specific, narrower meaning than wading bird:

wading bird: any of many long-legged birds that wade in water in search of food
shoebill: large stork-like bird of the valley of the White Nile with a broad bill suggesting a wooden shoe

wading bird (noun)	shoebill (noun)
any of many long-legged birds that wade in water in search of food	large stork-like bird of the valley of the White Nile with a broad bill suggesting a wooden shoe